Released from active Federal service 22 September 2009 and reverted to state control

Location changed 1 July 2010 to Mustang

ANNEX 1

Organized and Federally recognized 17 November 1921 in the Oklahoma National Guard at Enid as Headquarters Battery and Combat Train, 1st Battalion, 189th Field Artillery, an element of the 45th Division

Reorganized and redesignated 1 November 1939 as Headquarters Battery, 189th Field Artillery

Inducted into Federal service 16 September 1940 at Enid

Redesignated 11 February 1942 as Headquarters Battery, 202d Field Artillery, and relieved from assignment to the 45th Division